Hot valve for gas-making apparatus



July 27,1925. Q 1,593,855

A C. I. TENNEY ET AL HOT VALV-E FOR GAS MAKING APPARATUS Filed April 24. 1924 Patented July 27,

tries.

CHARLES I. TENNEY, 03B NEVWI'ON, IOWA, AND IPAUL W. 'IIilrYIilR, F MINNEAPOLIS,

IVIINNESOTA, ASSIGNORS TU AMERICAN TON, IOWA, A CORPORATION OF IOWA.

GAS CONSTRUCTION COMPANY, OF NEW- HOT VALVE FOR GAS-MAKING APPARATUS.

Application filed April 24, 1924.

This invention relates to a hot valve for gas making apparatus or similar apparatus. In gas making apparatus for making artificial illuminating or heating gas it is customary to employ a so-callcd generator which is a furnace chamber in which fuel is contained and through which a blast is blown to heat the same. The products of combustion from the generator are usually passed through a checker brick chamber called the carburetor, and usually through a second checker brick chamber called the superheater, from which the gas is passed to a stack or to a passage leading to a waste heat boiler. The hot valve in some gas making installations is installed between the generator and the carburetor, and in other cases is installed be tween the superheater and the stack where the hot products of combustion pass thereto. in such gas making apparatus there is always an accumulation of carbon or hydrocarbon deposited, such as carbon dust, incrusted carbon, tar. and the like. it it is attempted to use ordinary standard valves, such as sliding gate valves, this accumulation of tar, and the like, renders it extremely dil'l'icult to move the valves and to get a tight closure thereby. The more moving surfaces in contact on the valve, of course, the harder it is to move the valve.

It is an object of this invention to provide a simple and etii'cient valve particularly adapted for use as a hot valve and which can be placed between the generator and carburetor, between the carburetor and superheater. between the superheater and stack, or in the conduit leading from the superheater to the waste heat boiler.

lit is a further object of the invention to provide such a valve structure comprising a ring of hard material having a compara tively sharp edge together with a plate having an annular fiat surface adapted to contact said sharp edge of the ring, said plate being axially movable in alinement with s: id ring.

It is still another object of the invention to provide such a ring and plate, as above set forth, which plate is of concave-convex form having its convex side disposed toward the ring.

t is also" another object of the invention to provide such a ring and plate, which plate has a rod extending axially from one side Serial No. 708,704.

thereof and arranged for rectilinear movement, said rod being connected to said plate by a universal joint.

It is still another object of the invention to provide a valve structure comprising such a ring and plate as set forth, together with steam actuated rectilinearly movable means for moving said plate against said ring.

It is a still further object of the invention to mount said ring in the top or" an annular casing through which a cooling liquid is circulated.

These and other objects and advantages will be fully set forth in the following description made in connection with the accompanying drawin s in which like refer ence characters refer to the same parts throughout the diti'erent views, and in which Fig. 1 is a view for the most part in central vertical section through the valve and valve setting, a small part of the operating means for the valve being shown in Side elevation;

Fig. 2 is a partial vertical section similar to that shown in Fig. 1, showing the valve in closed position and shown on an enlarged scale; and

Fig. 3 is a partial horizontal section taken on the line 83 of Fig. 1. 1

Referring to the d awings, a portion of a gas making apparatus is shown comprising a wall 1 of lire brick or suitable refractory material through which extends the passage 2 at the bottom, from which passage a laterally extendcd passage 3 leads. The wall 1 is shown as covered with a suitable asbestos or other insulating covering l surrounded by the metal casing 5 and the top of wall 1 is shown as having the cylindrical passage (-3 thcrethrough over which extend the metal plates 7 and 8. The plate 8 connected to the casing 5 by headed and nutted bolts passing through angle plates 5 contacting the members 5 and 8 and disposed beneath the projecting edge of the latter. Mounted on the wall 1 above the opening 2 and surrounding the same is an annular casing 9 which is hollow and with which communicate the inlet and outlet pipes 10 and ll, respectively, which pipes will lead, respectively, to a water supply and discharge means. The casing 9 rests on a flat annular plate 9 bolted to angle brackets 5 bolted to casing 5,and a ring 9 underlies and supports the lUU inner edge of plate 9 A ring 12 is shown as disposed inside of the casing or casting 9 which also surrounds the passage 2 and which will be of hard inetal adapted to resist heat. The casing 9 has set into its top side adjacent its inner corner, a hardened steel ring 13, the inner and uter sides of which converge towards each other at its top edge to torin a con'iparatively sharp edge.

n plate 16lhas a-tiat annular surface 1e: on its underside adjacent its outer edge, which surface is disposed in a plane substantially normal to the axis of said plate. While said surface may be formed on said plate in any manner, in the embodiment of the invention illustrated, it is slipwn as i'crined on the lower side of ashort flange pro ecting downwardly at the edge oi the slate. As clearly shown on Fig. 1, the plate 1ais of concave-convex shape or depressed at its central portion, the convex side of said plate being disposed toward the ring 13. The top surface of said plate has a partly conical recess 1%" formed therein and a semi-spherical head 15 is disposed in said recess. Said head 10 is formed of two siinilar sections 15 and 15" divided along a diameter of said head and said sections are formed with an inwardly projecting flange adapted to seat in a groove 16 formed adjacent the end of a rod or shaft 16, the sections 15'" and 15 embracing said shaft and extending substantially to the end thereof. The sections 15 and 15 are held in engagement with the shaft by a ring 17 which its over the top thereof and rests on an external shoulder formed about said sections, said ring being titted tightly in place. The ring 17 has an upwardly projecting portion 17 of reduced diameter forming a flange about its outer surface and a fiat disk 18 has a central opening fitting over the portion 17, which disk is provided with a plurality of circuin'ferentially spaced holes adjacent its outer edge through which pass the headed and nutted bolts 19 securing said ring to the plate 1 1. Said bolts pass through the plate 1i and bosses 14: are formed on the concave side of said plate 14: on which the-dish 18 rests. It will thus be seen that the shaft 16 is securely connected to the plate '14 by a universal joint. The rod or shaft 16 e2:- tends upwardly through a stutiing box 20 disposed in the plates 7 and 8 and extends through the cylinder heads 21 and 21 of a steam cylinder 21, a piston 22 being secured on said rod at an intermediate threaded portion tiereon, said piston being held in place by a nut 23. The cylinder 21 is provided with suitable inlet and exhaust ports 21 at each end thereof with which communicate the inlet and exhaust pipes 2% and 25, respectively. The cylinder heads 21 and 21 are provided with flanges secured by l eaded and nutted bolts to flanges formed on the ends of cylinder 21, said cylinder lOVlClGCl with the usual stuff- 25 will be an exhaust passage. l l hen steam is turned into cylinder 21 above the piston 22, the rod 16, together with the plate 1 1 is given a quick inovenient downward and said plate is slapped as it were, against the ring 13, s face 1 contacting the sharp edge of said ring This quick slapping movcnicn" acts to cause the sharpened edge of ring L1 to cut through any deposit oi tar or carbon on the plate 1 1 or on the ring so that a tight and ciose engagement is secured between the plate and ring. This ti ht closure between the plate and ring is further e'tlected and rendered certain by the universal mounting oi? plate 1 1 on shaft 16. hen is desired to open the valve and passage an J'tCilll'l will be turned into cylinder 21 below the piston and the valve plate 1 1 will be lifted from ring 13. lt will be noted that the plate litis dire::cly away from he ring and there is no sliding movement oetween parts. The sticking eil'ect of any accumulation on the plate and ring is therefore reduced to a ininiinui'n or practica ly eliminated. '{Viili prior constructions of hot valv s considerable trouble has been ex perienced with the same cracking on account of expansion and contraction due to the intense heat encountered. In order to overctnne this eitect the plate 1% is made concaro-convei; shape and the expansion of the plate will, therefore, more easily be taken care of by the plate tending to flatten. The strain on the perimeter of the plate is thus reduced so that the plate will not crack at go. The ring 13 will be kept compara cool by the circulation of cooling er or other liquid through the casing 8 and pipes 10 and 11. It will also be noted that the cil'ective valve forming part of the plate 14 is at its outer edge where it is least in the path of the flame or-hot products oi inainly against the central portion of plate 1-1 The plate 14 is also cooled by supply ing ater to the upper surface thereof. The concave-convex or bowl-shape ot the plate also acts to eliectively retain this water. Such water could be supplied by a perl'orated annular conduit 28 extending about shaft 16 above the plate 1 1 and connected with any suitable water supply pipe 27.

From the above description it is seen that applicant has provided a simple and ellicient torin hot valve, together with an efficient operating inean's co-operating therewith. Such valves are of considerable size and or great weight and the provision of combustion which will impinge 7 ill Ill) such hot valves has heretofore been a serious problem. The present valve has eliminated at great difliculty in moving the valve, owing to the sticking thereof and at the same time secures a very effective closure. The use of steam is peculiarly adapted to such a valve, and the steam co-operates in the efiective closing movement of the valve. This results from the expansive function of the steam so that When the same enters the cylinder the piston is given a very quick impetus and movement which results, as above stated, in a quick slapping effect of the valve against the ring. It is only by such aquick movement that the crust or accumulated deposit on the parts can be cut through and an effective closure obtained. The device has been amply demonstrated in actual practice and found to be very successful and efficient.

It will, of course, be understood, that various changes may be made in the form, details, arrangement and proportions of the parts Without departing from the scope of applicants invention, which, generally stated, consists in a device capable of carrying out the objects above set forth, such as shown and described and defined in the appended claims.

Vhat is claimed is 1. A valve structure adapted for use in a gas making apparatus comprising a ring surrounding the valve opening and having a comparatively sharp edge directed parallel to its axis, a metal plate valve having an annular flat hard surface normal to the axis of said valve engaging With said sharp edge of said ring, and means for positively moving said valve axially and slapping the same against said ring.

2. A valve structure adapted for use in a gas making apparatus comprising a comparatively thin ring surrounding the valve opening and having a comparatively sharp vertically disposed edge, a metal plate valve having hard annular flat horizontal surface normal to the axis of said valve engaging with said sharp edge of said ring, and steamact-uated means for slapping said valve against said ring, whereby a quick action is produced against said ring and any deposits on said valve and ring are cut through and a tight engagement between said ring and valve effected, said valve being free for a gyrating motion about its axis so as properly to seat on said ring.

3. The structure set forth in claim 1, said ring being set into the top of an annular chambered casing, and means for circulating cooling liquid through said casing.

42. A hot valve structure for gas making apparatus comprising a comparatively thin ring surrounding the valve opening having a comparatively sharp upper edge directed parallel to its axis, a metal plate valve havapparatus comprising a ring surrounding the valve opening having a comparatively sharp upper edge, a metal plate valve having an annular fiat hard surface normal to the axis of said valve and engageable with said sharp edge, a rod extending axially from one side of said plate valve positively connected thereto in a longitudinal direction but said valve being free for gyrating movement about its axis, said rod being guided for rectilinear movement, apiston connected to said rod, a steam cylinder in which said piston reciprocates, and means for admitting steam to said cylinder at each side of said piston to operate said valve to slap the same against said ring or withdraw the same therefrom.

6. A hot valve structure for gas making apparatus comprising a circular plate valve having a central recess in its upper side,

a shaft having an annular groove adjacent.

its lower end extending axially from said plate, a pair of semi-cylindrical members having flanges fitting in said groove embracing and extending to the end of said shaft, said members having an external shoulder thereon, a ring embracing said members to contact said shoulder, and a disk apertured to surround said rod overlying said ring and secured to said first mentioned plate where by said shaft is connected to said plate by a universal joint.

7. A hot valve structure for gas making apparatus comprising a plate having an annular flat undersurface disposed normal to the central axis of said plate, a ring with which said surface is adapted to contact, said plate being disposed above said ring and being of conca-vo-convex form and having its convex side directed toward said ring whereby its concave side forms a reservoir for cooling water.

8. A hot valve for use in the hot blast passage of the outlet portion of a gas making generator comprising a ring having a comparatively sharp edge surrounding said passage, a valve plate independently mounted above said ring having an annular flat surface adapted to contact said ring, an actuating rod centrally connected to said valve holding said valve against any axial movement relative thereto but permitting a gyating movement about the axis of said valve and rod, and means reciprocating axially of said valve connected to said rod for slapping said valve against said ring.

9. A hot valve structure for gas machine apparatus comprising a plate convex on its lower side and concave on its upper side forcing the same against said ring and liftand having a plane annular horizontally dising the same therefrom.

posed surface on its lower side adjacent its In testimony whereof we aflix our signa- 10 outer edge, a ring having a vertically distures.

posed sharp edge with which said surface is adapted to contact, and means connected CHARLES I. TENNEY. centrally to the upper side of said plate for PAUL VJ. THAYER. 

